I use the geofense feature to open my garage door when I'm within range because my garage door is very slow. I love using my apple watch to open and close the door too. It works great. However, when the battery goes low in the wireless sensor is when problems occur. If I'm away at work when the battery goes low, I would receive random false notifications that my garage door is open when it was not or vice versa. I would stress out about whether the garage door is actually open. I'm not sure what the best course of action would be if the system receives a low battery indication. Also, I feel like i shouldn't have to tell the app the battery is new (tapping the low battery icon), but if i don't the battery icon keeps indicating a low battery. The review below mine, this may be what Greg L.'s problem is (a low battery in the wireless sensor seemed to stop the geofense from working for me).